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Observability in Microsoft Foundry: Tracing Agent Runs, Continuous Evaluation, and the OpenTelemetry Data Plane

Day 10 of the Microsoft Foundry 100 Days / 100 Blogs series. You shipped an agent. It calls a model, invokes two tools, retrieves a few documents, and returns an answer. It works in your dev loop.

  • Microsoft Foundry uses OpenTelemetry for distributed tracing, metrics, and logs.
  • Traces represent a single request's journey through the system, identified by a traceid.
  • Foundry exports traces to Azure Monitor Application Insights for unified observability.

5 Guardrails That Keep an LLM Agent Shippable in Production

An LLM agent that demos well and an LLM agent that survives production are almost different projects. The demo needs the happy path. Production needs everything else.

  • Limit agent to small set of tools with typed inputs and server-side validation
  • Place human in the loop for high-stakes actions, establish clear threshold
  • Build evaluation harness with real cases for every change

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